I agree with you. I have the platystele ortiziana and the flowers are different (it's been blooming since May). Funny how things work: the umbellata is on my list as well for the Feb. show!
They ship, but they also attend a fair number of showa all over the continent. Check the section "events and shows" on their website. It may be possible to have the plants sent from a U.S. location, or you could attend one of those shows.